US3982578A - Pneumatic tires - Google Patents
Pneumatic tires Download PDFInfo
- Publication number
- US3982578A US3982578A US05/480,387 US48038774A US3982578A US 3982578 A US3982578 A US 3982578A US 48038774 A US48038774 A US 48038774A US 3982578 A US3982578 A US 3982578A
- Authority
- US
- United States
- Prior art keywords
- felt
- pneumatic tire
- tire according
- layer
- carcass ply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
- B60C13/04—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof having annular inlays or covers, e.g. white sidewalls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/12—Carcasses built-up with rubberised layers of discrete fibres or filaments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
- B60C9/2006—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords consisting of steel cord plies only
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10765—Characterized by belt or breaker structure
- Y10T152/10774—Consisting of only one ply
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10819—Characterized by the structure of the bead portion of the tire
- Y10T152/10828—Chafer or sealing strips
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T152/00—Resilient tires and wheels
- Y10T152/10—Tires, resilient
- Y10T152/10495—Pneumatic tire or inner tube
- Y10T152/10855—Characterized by the carcass, carcass material, or physical arrangement of the carcass materials
- Y10T152/10864—Sidewall stiffening or reinforcing means other than main carcass plies or foldups thereof about beads
Definitions
- This invention relates to pneumatic tires.
- a pneumatic tire having a tread portion and sidewall portions comprises a reinforcing layer including at least one metal wire felt, the felt comprising a mat of interpenetrated substantially aligned crimped continuous metal wires or bunches of wires, the interpenetration of the wires being in the nature of an intermingling in three dimensions produced by laying the crimped wires or bunches of wires under tension and substantially relaxing the tension.
- the crimping of wires or bunches of wires for use in the felt included in the reinforcing layer of the present invention may be achieved in a number of ways; for example, by false twisting, i.e., twist the wire or bunch of wires, stabilize the twist by, e.g., passing through a series of rollers and remove the twist; by stuffer box treatment i.e. by feeding the wires or bunches of wires into a chamber having a smaller exit than inlet thereby crushing the wires; by gear crimping in which the wires are passed between fluted rollers; and by edge crimping in which the fibers are drawn over an edge.
- Such felts have been described in the assignee's U.S. Pat. No. 3,235,935 and in the assignee's U.S. application Ser. No. 480,388 filed June 18, 1974, now U.S. Pat. No. 3,892,376 of July 1, 1975.
- the metal wire is steel wire
- the diameter of the individual wires in the felt is between 0.04 mm and 0.71 mm.
- the wires may be brass or zinc plated.
- the cross-section of the wires in the felt need not be circular but the cross-sectional area of such wires is preferably equivalent to the cross-sectional area of a circular wire having a diameter in the range 0.04 mm to 0.71 mm.
- the bunches of wires may form twisted strands, which in turn may be twisted together to form cords, the strands or cords then being crimped.
- the felt may be consolidated by needling with a barbed needle.
- the metal wire felt is rubberized prior to inclusion into the tire.
- the felt may be rubberised by the hot or cold calendering of the rubber material onto the felt or by injection moulding of the rubber material onto the felt.
- the weight of wire in a felt covered with rubber material is no greater than 80%.
- the reinforcement may comprise breaker layers, sidewall reinforcements, tread reinforcements, between ply reinforcement and bead filler and chafer strips.
- the felt is particularly useful as a tread reinforcement in a winter tire for improving the traction qualities of such tires in snow or icy conditions.
- the felt can be included in the tread without any tread pattern being moulded therein.
- a tread pattern comprising large blocks or ribs having little or no secondary grooving or slotting therein may be moulded directly into the tread portion incorporating the felt, the felt remaining adjacent the ground-contacting surface of the ribs or blocks.
- FIG. 1 shows a transverse cross-section of a tread portion of a tire according to a first embodiment of the invention
- FIGS. 2, 3 and 4 show a transverse cross-section of a tire sidewall according to variations of a second embodiment of the invention
- FIG. 5 shows a transverse cross-section similar to FIG. 2 of a modification of the second embodiment
- FIG. 6 shows a similar view of FIG. 5 of a second modification of the second embodiment
- FIG. 7 shows a transverse cross-section of a tread portion of a tire according to a third embodiment of the invention.
- FIG. 8 shows a transverse cross-section of a tire bead region according to fourth, fifth and sixth embodiments of the invention.
- FIGS. 9 and 10 are plan views of the felt.
- a pneumatic tire 1 has a carcass 2 of at least one textile cord fabric ply and may be of either radial - or cross-ply construction.
- the tire 1 is provided with a reinforcing layer comprising at least one breaker layer 3 of rubberized metal wire felt.
- the felt provides breaker layers of higher modulus than the hitherto used textile breaker layers thereby allowing a reduction of the number of layers required for a given tire construction. Additionally, the felt layers provide greater protection against damage than the textile breaker layers; and cause tires to exhibit cooler running properties.
- tread 4 of the tire 1 has been shown without any tread pattern therein, any deisred pattern can be moulded into tread 4.
- the pneumatic tire 1 may have a carcass of textile cord fabric in cross-ply construction or may have a carcass of textile or steel cord fabric in radial ply construction.
- the particular carcass construction shown comprises a single carcass ply 5 disposed radially of the tire, a breaker layer 6 being provided in the tread portion 4.
- the carcass ply 6 is turned around tire beads 7.
- the tire 1 is provided with a single sidewall reinforcing layer 8 of rubberized metal wire felt.
- the layer 8 forms the surface 14 of the sidewall 9 and is disposed radially outwardly of the carcass ply 5.
- the sidewall reinforcing layer 8 is disposed adjacent to and immediately radially outwardly of the carcass ply 5 in the sidewall 9 of the tire 1.
- the layers 8, 10 to 13 extend radially inwardly from the shoulder region 15 of the tire 1 to a point 14a, which point 14a lies radially outwardly of the bead base 7a by an amount substantially equal to the radial extent of a rim flange of a wheel on which the tire is mounted during use.
- the layers may extend only a short distance either side of the widest point of the tire, i.e. the point at which maximum deflection occurs, and therefore at which maximum damage is likely to occur.
- the reinforcing layer(s) of rubberized metal wire felt in the sidewall of the tires provide a damage resistant layer which will help to prolong the life of a tire liable to sidewall damage such as an off-the-road tire. Additionally, the layer(s) modify the deflection characteristics of the sidewalls to reduce deflection of the sidewalls during use of the tire whereby damage is less likely to occur.
- the layer 8 is located on the inner surface 16 of the tire 1.
- a reinforcing layer 8 of the felt is positioned between the carcass plies 17,18 of a tire having at least two carcass plies of textile cord fabric in radial- or cross-ply construction.
- the higher modulus of the layer 8 as compared to conventional rubber ply separation layers reduces sidewall deflection during use of the tire and also provides better protection against damage.
- a layer 8 between the carcass plies extending over the crown region of the tire 1 may be used, the layer 8 thereby providing protection against damage in the crown region also.
- a reinforcing layer of metal wire felt comprises tread reinforcing layer.
- the tire 1 has a radial- or cross-ply carcass 19 and can have a breaker layer 20 either similar to layer 3 in FIG. 1 or of conventional construction.
- the tread 4 of the tire 1 is provided with a reinforcing layer consisting of substantially circumferential layers 21-25 of metal wire felt extending substantially over the whole of the axial width of the tread 4 and disposed immediately radially inwardly of the ground-contacting surfaces 26.
- the layers 21-25 improve wear and damage resistance and improve the traction qualities of the tread 4.
- the reinforcing layers of felt, 21-25 can be used in addition to a steel breaker layer of a radial ply tire or can be used in addition to, or replace the textile or steel breaker layers of a cross-ply tire.
- the layers 21-25 can be replaced by a single layer of felt of suitable thickness.
- the tread 4 of the tire is provided with at least one groove, the reinforcing layer comprising at least two groups of a plurality of layers of felt of a width substantially equal to the width of ribs formed by said groove, one group being disposed in each rib and being located immediately radially inwardly of the ground-contacting surface of the tread 4.
- the radially innermost of the layers of felt in each rib being at the same radial height as the base of the groove.
- each group may comprise a single layer of felt of suitable thickness.
- a further reinforcing layer consisting of at least one layer of felt of a width substantially equal to the width of the tread may be provided radially inwardly of the base of the groove.
- the bead region 27 of the tire 1 is provided with a bead wire 28.
- the tire 1 has at least one carcass ply 29 having a ply turn-up 29a turned around the bead wire 28.
- the bead region 27 is also provided with a reinforcing layer comprising a chafer strip 30 of metal wire felt located around the bead heel 31.
- a chafer strip 30 has greater wear resistance than the conventional hard rubber or textile fabric chafer strips.
- the reinforcing strip comprises a bead filler 32 of metal wire felt, the filler 32 being located either axially inwardly of or axially outwardly of (as shown) the ply turn-up 29a.
- the filler 32 extends radially inwardly and outwardly of the end 29b of the turn-up 29a to act as a ply extension strip.
- the flexibility of the felt used in the filler tends to reduce the problem of failure of the tire due to the abrupt change in stiffness at the ply end 29b.
- the filler 32 is extended radially inwardly and turned around the bead wire 28.
- the reinforcing layer comprises a plurality of strips of felt of varying width forming a bead apex component 33.
- the strips of felt decrease progressively in width from strip 34 forming one side of the apex 33.
- the strips may progressively decrease in width on either side of a central strip extending from the base to the tip of the apex 33.
- the plurality of strips may be formed by folding a single strip of felt of a width sufficient to form the apex 33.
- the felt is stiffer than the conventional hard rubber apices.
- an apex 33 is used in conjunction with the filler 32 to offset the increase in flexibility of the filler 32 over coventional steel cord fillers with the increase in stiffness of the apex 33.
- the three embodiments all shown in FIG. 8 need not necessarily be always used together.
- the felt is preferably rubberized prior to incorporation into the tire.
- a reiforcing layer comprising metal wire felt is used, particularly when replacing steel cord fabric, e.g. filler strips, in the tire problems associated with the cut edge of the fabric are reduced or obviated.
- the problems comprise failure due to the cut edge damage the rubber of the tire on flexing during use thereof, this being aggrevated by the ends of the cut cords not being brass or zinc plated resulting in no bond or only a week bond between the rubber and the steel.
- the felts being made to the appropriate width, do not have cut edges and the wires are also brass or zinc plated resulting in a good bond between the rubber and the wires.
- the felts were each needled felts and were formed into a tread strip by being located between the inner two strips of four strips of tread rubber compound of approximately 0.8 mm thickness, the resultant thickness of the tread strip being approximately 4 mm.
- Example II Three further 2.25-8 model tires (F, G and H) were prepared as for Example I including abrasion prior to testing. Details are given in Table III.
- Example I Nine further 2.25-8 model tires (I to Q) were prepared as for Example I including abrasion prior to testing.
- the tires I to L were made using one type of tread compound and the tires M to Q using a second type of tread compound. Details of the felts used are given in Table V.
- Table VI shows the average co-efficients of friction determined for the tires both in the "stick-slip" and the steady slide conditions.
- the co-efficients are averages of six tests on each tire, five pulses being counted for the pulse figure given.
- the co-efficients are given as compared to the tires not having felt in the tread.
- Two 20.5-25 cross-ply tires R and S, having nylon carcass plies with a ply rating of 16 were prepared with one and two layers of felt respectively in place of the normal two layer nylon fabric breaker assembly.
- the felt used comprised wires of 0.15 mm. diameter and had a density of 0.75 kg/m 2 .
- the felt was calendered on each side with a 2 mm. thick layer of rubber prior to incorporation into the tire and had 13.6% by weight of wire after calendering.
- the conventional gauge tread strip was applied to the tire resulting in tires having a thicker tread than the standard tire with nylon breaker layers as is given in Table
- Tire R having a single layer of felt, gave a Ton M.P.H. (measure or running temperature characteristics) rating of 10.5% better than the standard tire; and tire S, having a double layer of felt, gave a Ton M.P.H. rating substantially equal to the standard tire. Therefore, it is estimated that at least a 15% advantage in tire running temperature characteristics by using felt in this manner in a tire having the same tread thickness as the standard tire.
- FIGS. 9 and 10 are reproductions of X-ray photographs of the felts.
- FIG. 9 shows a unneedled felt after calendering. This felt is of 0.18 mm wire and of a density of 0.5 kg per square meter.
- FIG. 10 shows the felt of FIG. 9 after needle-punching, the density of the felt being 0.76 kg per square meter.
- the felt shown in FIG. 10 is the same as that described above for Tire G in Example II.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
TABLE I ______________________________________ Wire diameter in Measure of felt density Tire felt (mm) (kg/m.sup.2) ______________________________________ A -- -- B 0.15 0.85 C 0.18 1.4 D 0.22 1.66 E 0.23 2.02 ______________________________________
TABLE II ______________________________________ Co-efficient of Friction Tire Initial Sliding ______________________________________ A 0.35 0.28 B 0.99 0.46 C 1.27 0.70 D 1.06 0.66 E 1.13 0.52 ______________________________________
TABLE III ______________________________________ Measure of Tire Wire diameter in felt (mm) density of felt (kg/m.sup.2) ______________________________________ F -- -- G 0.18 0.76 H 0.18 1.20 ______________________________________
TABLE IV ______________________________________ Braking Co-efficient -0.5°C. -2.5°C. Tire Peak Slide Peak Slide ______________________________________ F 0.085 0.019 0.209 0.047 G 0.113 0.038 0.216 0.044 H 0.083 0.024 0.195 0.044 ______________________________________
TABLE V ______________________________________ Measure of density of felt Tire Wire diameter in felt (mm) (kg/m.sup.2) ______________________________________ I -- -- J 0.22 0.76 K 0.22 1.00 L 0.22 1.20 M -- -- N 0.176 1.6 O 0.22 2.0 P 0.38 2.1 Q 4 × 0.25(lay 8.5 mm S) 3.3 ______________________________________
TABLE VI ______________________________________ Co-efficient of Friction Tire Pulse Steady Sliding ______________________________________ I 100 100 J 128 247 K 126 242L 140 240 M 100 100 N 125 322 O 132 228 P 114 223 Q 119 283 ______________________________________
TABLE VII ______________________________________ Tread thickness in excess of the standard tire tread ______________________________________ Mid-circumferential Tire Shoulder line ______________________________________R 8 mm. 3 mm.S 10 mm. 6 mm. ______________________________________
Claims (26)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
UK30256/73 | 1973-06-26 | ||
GB3025673A GB1472745A (en) | 1973-06-26 | 1973-06-26 | Pneumatic tyres |
Publications (1)
Publication Number | Publication Date |
---|---|
US3982578A true US3982578A (en) | 1976-09-28 |
Family
ID=10304771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/480,387 Expired - Lifetime US3982578A (en) | 1973-06-26 | 1974-06-18 | Pneumatic tires |
Country Status (5)
Country | Link |
---|---|
US (1) | US3982578A (en) |
BE (1) | BE816781A (en) |
GB (1) | GB1472745A (en) |
NL (1) | NL7408509A (en) |
ZM (1) | ZM9874A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5439041A (en) * | 1991-10-08 | 1995-08-08 | Bridgestone/Firestone, Inc. | Vehicle tire including lightweight stiffening spacer in each sidewall |
US5538063A (en) * | 1994-12-23 | 1996-07-23 | The Goodyear Tire & Rubber Company | Aircraft tire with reinforcement insert |
US6415840B1 (en) * | 1997-05-26 | 2002-07-09 | Bridgestone Corporation | Pneumatic safety tire with rubber-organic filament fiber layer |
US6568446B1 (en) * | 1999-03-05 | 2003-05-27 | Continental Aktiengesellschaft | Pneumatic bicycle tire having protection against wear and reduced rolling resistance |
US20070128976A1 (en) * | 2003-12-23 | 2007-06-07 | Valerio Accerenzi | Electric toy vehicle with improved grip |
US20140305558A1 (en) * | 2011-12-16 | 2014-10-16 | Compagnie Generale Des Etablissements Michelin | Tyre having a tread comprising an impregnated felt |
US20140326377A1 (en) * | 2011-12-16 | 2014-11-06 | Michelin Recherche Et Technique S.A. | Tyre having a tread comprising a felt |
US9962996B2 (en) * | 2011-12-16 | 2018-05-08 | Compagnie Generale Des Etablissements Michelin | Tread comprising tread pattern elements covered with an impregnated fibre assembly |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2397296A1 (en) * | 1977-07-11 | 1979-02-09 | Kleber Colombes | PNEUMATIC WRAP |
IT1132524B (en) * | 1980-07-08 | 1986-07-02 | Pneumatici Pirelli Sa Soc | IMPROVEMENTS TO THE ANNULAR STRUCTURE OF REINFORCEMENT OF THE RAIDAL TIRES |
JPH0796873A (en) * | 1993-09-28 | 1995-04-11 | Ohtsu Tire & Rubber Co Ltd :The | Crawler running device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1395686A (en) * | 1919-09-18 | 1921-11-01 | George W Lindley | Pneumatic tire |
US2184326A (en) * | 1936-07-22 | 1939-12-26 | Owens Corning Fiberglass Corp | Tire |
US2257647A (en) * | 1939-11-09 | 1941-09-30 | Nat Standard Co | Tire casing |
US2257604A (en) * | 1940-01-31 | 1941-09-30 | Nat Standard Co | Tire casing |
US2258031A (en) * | 1940-05-17 | 1941-10-07 | Nat Standard Co | Reinforced article |
US3299935A (en) * | 1965-04-19 | 1967-01-24 | Goodyear Tire & Rubber | Tire |
US3895665A (en) * | 1971-12-24 | 1975-07-22 | Freudenberg Carl Fa | Reinforcement for rubber tires |
-
1973
- 1973-06-26 GB GB3025673A patent/GB1472745A/en not_active Expired
-
1974
- 1974-06-18 US US05/480,387 patent/US3982578A/en not_active Expired - Lifetime
- 1974-06-21 ZM ZM98/74A patent/ZM9874A1/en unknown
- 1974-06-24 BE BE145817A patent/BE816781A/en unknown
- 1974-06-25 NL NL7408509A patent/NL7408509A/xx unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1395686A (en) * | 1919-09-18 | 1921-11-01 | George W Lindley | Pneumatic tire |
US2184326A (en) * | 1936-07-22 | 1939-12-26 | Owens Corning Fiberglass Corp | Tire |
US2257647A (en) * | 1939-11-09 | 1941-09-30 | Nat Standard Co | Tire casing |
US2257604A (en) * | 1940-01-31 | 1941-09-30 | Nat Standard Co | Tire casing |
US2258031A (en) * | 1940-05-17 | 1941-10-07 | Nat Standard Co | Reinforced article |
US3299935A (en) * | 1965-04-19 | 1967-01-24 | Goodyear Tire & Rubber | Tire |
US3895665A (en) * | 1971-12-24 | 1975-07-22 | Freudenberg Carl Fa | Reinforcement for rubber tires |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5439041A (en) * | 1991-10-08 | 1995-08-08 | Bridgestone/Firestone, Inc. | Vehicle tire including lightweight stiffening spacer in each sidewall |
US5538063A (en) * | 1994-12-23 | 1996-07-23 | The Goodyear Tire & Rubber Company | Aircraft tire with reinforcement insert |
US6415840B1 (en) * | 1997-05-26 | 2002-07-09 | Bridgestone Corporation | Pneumatic safety tire with rubber-organic filament fiber layer |
US6568446B1 (en) * | 1999-03-05 | 2003-05-27 | Continental Aktiengesellschaft | Pneumatic bicycle tire having protection against wear and reduced rolling resistance |
US20070128976A1 (en) * | 2003-12-23 | 2007-06-07 | Valerio Accerenzi | Electric toy vehicle with improved grip |
US20140305558A1 (en) * | 2011-12-16 | 2014-10-16 | Compagnie Generale Des Etablissements Michelin | Tyre having a tread comprising an impregnated felt |
US20140326377A1 (en) * | 2011-12-16 | 2014-11-06 | Michelin Recherche Et Technique S.A. | Tyre having a tread comprising a felt |
US9962996B2 (en) * | 2011-12-16 | 2018-05-08 | Compagnie Generale Des Etablissements Michelin | Tread comprising tread pattern elements covered with an impregnated fibre assembly |
Also Published As
Publication number | Publication date |
---|---|
NL7408509A (en) | 1974-12-30 |
BE816781A (en) | 1974-10-16 |
ZM9874A1 (en) | 1976-11-22 |
GB1472745A (en) | 1977-05-04 |
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Legal Events
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